From fbd128b56490046de31a2be0349931912a9ba71b Mon Sep 17 00:00:00 2001
From: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Tue, 19 May 2015 23:43:58 +0200
Subject: [PATCH] fold: check -N form properly

---
 fold.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fold.c b/fold.c
index 1d88ed9..8019125 100644
--- a/fold.c
+++ b/fold.c
@@ -85,7 +85,8 @@ main(int argc, char *argv[])
 		width = estrtonum(EARGF(usage()), 1, MIN(LLONG_MAX, SIZE_MAX));
 		break;
 	ARGNUM:
-		width = estrtonum(argv[0], 1, MIN(LLONG_MAX, SIZE_MAX));
+		if (!(width = ARGNUMF()))
+			eprintf("illegal width value, too small\n");
 		break;
 	default:
 		usage();